﻿<%@ webhandler Language="C#" class="Upload" %>

/**
 * KindEditor ASP.NET
 *
 * 本ASP.NET程序是演示程序，建议不要直接在实际项目中使用。
 * 如果您确定直接使用本程序，使用之前请仔细确认相关安全设置。
 *
 */

using System;
using System.Collections;
using System.Web;
using System.IO;
using System.Globalization;
using LitJson;
using System.Web.SessionState;

public class Upload : IHttpHandler, IRequiresSessionState
{
	private HttpContext context;

	public void ProcessRequest(HttpContext context)
	{
        if (context.Session["su_no"] != null)
        {
            try
            {
                int su_no = Convert.ToInt32(context.Session["su_no"]);
                context.Session["su_no"] = su_no;
                string su_login = Convert.ToString(context.Session["su_login"]);
                context.Session["su_login"] = su_login;
                string su_power = Convert.ToString(context.Session["su_power"]);
                context.Session["su_power"] = su_power;
            }
            catch (Exception e)
            {
                showError("没有权限！");
            }
        }
        else
            showError("没有权限！");
            
		//文件保存目录路径
        String savePath = System.Configuration.ConfigurationManager.AppSettings["Upload"];

		//文件保存目录URL
        String saveUrl = System.Configuration.ConfigurationManager.AppSettings["Upload"];

		//定义允许上传的文件扩展名
		Hashtable extTable = new Hashtable();
		extTable.Add("image", "gif,jpg,jpeg,png,bmp");
		extTable.Add("flash", "swf,flv");
		extTable.Add("media", "swf,flv,mp3,wav,wma,wmv,mid,avi,mpg,asf,rm,rmvb");
		extTable.Add("file", "doc,docx,xls,xlsx,ppt,htm,html,txt,zip,rar,gz,bz2");

		//最大文件大小
		long maxSize = 1024 * 1024 * 10;
		this.context = context;

		HttpPostedFile imgFile = context.Request.Files["imgFile"];
		if (imgFile == null)
		{
			showError("请选择文件！");
		}

		String dirPath = context.Server.MapPath(savePath);
		if (!Directory.Exists(dirPath))
		{
			showError("上传目录不存在！");
		}

		String dirName = context.Request.QueryString["dir"];
		if (String.IsNullOrEmpty(dirName)) {
			dirName = "image";
		}
		if (!extTable.ContainsKey(dirName)) {
			showError("目录名不正确！");
		}

		String fileName = imgFile.FileName;
		String fileExt = Path.GetExtension(fileName).ToLower();

		if (imgFile.InputStream == null || imgFile.InputStream.Length > maxSize)
		{
			showError("上传文件大小超过限制！");
		}

		if (String.IsNullOrEmpty(fileExt) || Array.IndexOf(((String)extTable[dirName]).Split(','), fileExt.Substring(1).ToLower()) == -1)
		{
			showError("上传文件扩展名只允许" + ((String)extTable[dirName]) + "格式！");
		}

        //创建文件夹
        string c_dirPath = "";
        if ("file".Equals(dirName))
        {
            c_dirPath = dirPath;
            c_dirPath += "c_" + dirName + "/";
            if (!Directory.Exists(c_dirPath))
                Directory.CreateDirectory(c_dirPath);
        }
		dirPath += dirName + "/";
		saveUrl += dirName + "/";
		if (!Directory.Exists(dirPath)) {
			Directory.CreateDirectory(dirPath);
		}
		String ymd = DateTime.Now.ToString("yyyyMMdd", DateTimeFormatInfo.InvariantInfo);
		dirPath += ymd + "/";
		saveUrl += ymd + "/";
		if (!Directory.Exists(dirPath)) {
			Directory.CreateDirectory(dirPath);
		}
        if ("file".Equals(dirName))
        {
            c_dirPath += ymd + "/";
            if (!Directory.Exists(c_dirPath))
                Directory.CreateDirectory(c_dirPath);
        }
        
		String newFileName = DateTime.Now.ToString("yyyyMMddHHmmss_ffff", DateTimeFormatInfo.InvariantInfo) + fileExt;
		String filePath = dirPath + newFileName;

		imgFile.SaveAs(filePath);
        if ("file".Equals(dirName))
            imgFile.SaveAs(c_dirPath + newFileName);

        FileInfo f = new FileInfo(filePath);
        String fileUrl = saveUrl + newFileName;

		Hashtable hash = new Hashtable();
        hash["error"] = 0;
        hash["url"] = fileUrl;
        hash["time"] = f.LastWriteTime;
        if (dirName.Equals("file"))
        {
            Int64 ret = new sql().SaveFile(hash);
            if (ret <= 0)
                showError("上传文件失败！");
            //else
            //    hash["fileid"] = ret;
        }
		context.Response.AddHeader("Content-Type", "text/html; charset=UTF-8");
		context.Response.Write(JsonMapper.ToJson(hash));
		context.Response.End();
	}

	private void showError(string message)
	{
		Hashtable hash = new Hashtable();
		hash["error"] = 1;
		hash["message"] = message;
		context.Response.AddHeader("Content-Type", "text/html; charset=UTF-8");
		context.Response.Write(JsonMapper.ToJson(hash));
		context.Response.End();
	}
    
	public bool IsReusable
	{
		get
		{
			return true;
		}
	}
}
